[CentOS] 40TB File System Recommendations

Tue Apr 12 14:21:30 UTC 2011
Boris Epstein <borepstein at gmail.com>

On Tue, Apr 12, 2011 at 3:36 AM, Alain Péan <alain.pean at lpp.polytechnique.fr
> wrote:

> Le 12/04/2011 09:23, Matthew Feinberg a écrit :
> > Hello All
> >
> > I have a brand spanking new 40TB Hardware Raid6 array to play around
> > with. I am looking for recommendations for which filesystem to use. I am
> > trying not to break this up into multiple file systems as we are going
> > to use it for backups. Other factors is performance and reliability.
> >
> > CentOS 5.6
> >
> > array is /dev/sdb
> >
> > So here is what I have tried so far
> > reiserfs is limited to 16TB
> > ext4 does not seem to be fully baked in 5.6 yet. parted 1.8 does not
> > support creating ext4 (strange)
> >
> > Anyone work with large filesystems like this that have any
> > suggestions/recommendations?
>
> Hi Matthew,
>
> I would go for xfs, which is now supported in CentOS. This is what I use
> for a 16 TB storage, with CentOS 5.3 (Rocks Cluster), and it woks fine.
> No problem with lengthy fsck, as with ext3 (which does not support such
> capacities). I did not try yet ext4...
>
> Alain
>
> --
> ==========================================================
> Alain Péan - LPP/CNRS
> Administrateur Système/Réseau
> Laboratoire de Physique des Plasmas - UMR 7648
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> 4, av de Neptune, Bat. A
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> ==========================================================
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I fully second Alain's opinion. An fsck on a 6 TB RAID6 containing about 30
million files takes over 10 hours.

As for XFS, we are running it on a 25 TB array and so far there has been no
trouble.

Boris.

Boris.
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